safe sex

例句：

1. 1. They decided to use safe sex to prevent pregnancy.
   他们决定使用安全套来预防怀孕。
2. 2. Safe sex is an important topic for couples planning to have children.
   安全套是计划要孩子的夫妇的一个重要话题。
3. 3. The government has issued guidelines on safe sex to reduce the spread of sexually transmitted diseases.
   政府已经发布了关于安全套使用以减少性传播疾病的指南。